4 o 4 M. W. R. de V. GRAHAM 



propodeum with plicae weak, often sharp only at hind margin and other- 

 wise represented only by basal foveae . . CAPELLIA Delucchi (p. 475) 



- Gena without a hollow above base of mandible. Either the marginal vein is 



1-5 to 2-3 times as long as the stigmal vein ; or the first funicular segment 



is at most slightly longer than the pedicellus . . . . .127 



127 (126) Propodeum with plicae represented only by foveae at base of propodeum ; 



spiracular sulci absent or very shallow. . . . . . .128 



- Propodeal plicae at least sharp posteriorly ; spiracular sulci most often 



distinctly impressed, sometimes punctate or with transverse costulae . 131 



128 (127) Marginal vein of fore wing only about 1-2 times as long as the stigmal vein ; 



body bronze-black ; both mandibles with four teeth ; first funicular 

 segment not or hardly longer than the pedicellus PEGOPUS Forster (p. 684) 



- Marginal vein 1-4 to 2-3 times as long as the stigmal vein. Head and thorax 



sometimes mainly green to blue. Mandibles sometimes with three teeth. 



First funicular segment sometimes much longer than the pedicellus . . 129 



129 (128) Propodeum between the spiracles convex, shiny, smooth or weakly aluta- 



ceous ; pronotal collar sharply margined ; left mandible with three teeth, 

 right mandible with four ; marginal vein 1-7 to 2-3 times as long as the 

 stigmal vein ; head and thorax mainly bright green 



CHLOROCYTUS Graham (p. 611) 

 Propodeum between the spiracles distinctly reticulate ; pronotal collar 

 sometimes weakly margined ; mandibular teeth sometimes otherwise ; 

 marginal vein sometimes relatively shorter ; head and thorax often dark 

 blue or dark green . . . . . . . . . .130 



130 (129) Both mandibles with three teeth. Pronotal collar evenly margined through- 



out, sometimes very finely, but most often strongly 



HOLCAEUS Thomson (p. 584) 



- Left mandible with three or four teeth, right mandible with four. Pronotal 



collar weakly and irregularly margined . HOMOPORUS Thomson (p. 444) 



131 (127) Gastral petiole i-6 to i-8 times as long as broad, about two-thirds as long as 



the propodeum, subcylindrical, with one to two hairs on each side. 



Marginal vein about twice as long as the stigmal vein. Propodeum 

 medially slightly more than half as long as the scutellum 



ISOCYRTUS Walker (p. 624) 



- Gastral petiole at most as long as broad, but most often transverse, sub- 



conical, without hairs laterally . . . . . . . .132 



132 (131) Lower edge of antennal toruli not or hardly above level of ventral edge of eyes 133 



- Lower edge of antennal toruli distinctly above level of ventral edge of eyes 134 

 x 33 ( x 3 2 ) Antennae blackish with at most the scape partly pale ; femora mainly black ; 



gaster immaculate .... CHLOROCYTUS Graham (p. 611) 



- Antennae and legs, except coxae, mainly to entirely yellow ; gaster usually 



with a yellowish spot or band . . MESOPOLOBUS Westwood (p. 638) 



134 (132) Pronotal collar margined at most over its middle third, and sometimes 



weakly so ........... 135 



- Pronotal collar margined throughout, or except j ust at the sides . . . 137 

 T 35 ( J 34) Antennal pedicellus, in dorsal view, about twice as long as broad, at least 



slightly longer than the first funicular segment. Either the metanotal 

 dorsellum is finely reticulate ; or the clypeus is mainly reticulate 



TOMICOBIA Ashmead (p. 784) 



- Antennal pedicellus in dorsal view usually 1 to i-6 times as long as broad, 



if rather longer then the metanotal dorsellum is smooth. Clypeus striate 136 

 x 36 (135) In exact dorsal view of thorax, the pronotal neck (Text-fig. 333 n) appears 

 at least slightly longer than the collar, which is short medially. Post- 



